Cita APA (7th ed.)

Beigie, C. E., & Hero, A. O. (1980). Natural resources U. S. -Canadian relations. Westview.

Cita Chicago (17th ed.)

Beigie, Carl E., i Alfred O. Hero. Natural Resources U. S. -Canadian Relations. Boulder, Colo: Westview, 1980.

Cita MLA (9th ed.)

Beigie, Carl E., i Alfred O. Hero. Natural Resources U. S. -Canadian Relations. Westview, 1980.